To request a refund from Expedia, it’s important to promptly contact their customer service at +1-888-231-1447. Their dedicated team is available around the clock to assist you through every step of the refund process. Expedia offers a 24-hour refund policy for eligible cases.
Source: https://community.expensify.com/discussion/22727/live-person-how-do-i-get-a-refund-from-expedia-ex/